Means for mounting electric condensers or other articles on support plates



y 1944- w. c. HANDLEY ET AL 2,354,015

' MEANS FOR MOUNTING ELECTRIC CONDENSERS OR OTHER ARTICLES ON SUPPORT PLATES Filed Oct. 14. 194

WILLIAM C. HflNDLEY Josmm C. Ouaru:

Inventors A tlorneys Patented July 18, 1944 MEANS FOR MOUNTING ELECTRIC CON- D ENSERS OR OTHER ARTICLES ON SUP- PORT PLATES William Cecil Handley, Frodsham, and Joshua Greer Quayle, Helsby, via Warrington, England, assignors to British Insulated Cables Limited, Prescot, Lancashire, England, a British com- Application October 14, 1942, Serial No. 462,034

I In Great Britain November 11, 1941 1 Claim.

This invention relates to the mounting of articles on a support plate and is particularly but by no means exclusively applicable to the mount; ing of metal canisters, for instance, cans containing electric condensers. In accordance with our invention the article is secured to the support plate by means of a mounting ring embracing the article. The ring engages a circumferential bead (or equivalent projection) on the article on the side of the bead remote from the support plate and is spaced from the adjacent surface of the support plate. It has a number of lugs adapted to be passed through correspondingly positioned and shaped apertures in the support plate to provide projecting portions which are deformed, for instance by having been upset, bent or twisted, and serve to anchor the ring to the support plate and so clamp the article to the adjacent surface of the support plate. Preferably the mounting ring comprises a circumferential portion and an inwardly directed flange portion extending from one edge of the circumferential portion and long anchoring lugs of rectilinear cross-section extending from the other edge.

The invention will now be more fully described with the aid of the accompanying drawing which by way of example illustrates the manufacture and use of forms of mounting ring designed for clamping cylindrical electrical condenser cans to a support.

In the drawing Figure 1 is a plan of one form of the mounting ring at a stage in the manufacturing thereof,

Figure 2 is an elevation, partly in section of the completed mounting ring,

Figure 3 is an elevation showing a condenser can secured to its support plate by the mounting ring shown in Figure 2,

Figure 4 is a plan of a modified form of mounting ring,

Figure 5 is an elevation showing a narrowbased article secured to a support by means of a mounting ring of the form shown in Figure 4, and

Figure 6 is a plan of a further form of mounting ring.

The ring shown in Figures 2 and 3 is made of sheet metal, for instance, mild steel, by stamping out an annulus l with two or more long tongues 2 extending radially outwards from its outer edge, as shown in Figure 1. This annulus is then subjected to a cupping operation to form a ring comprising a circumferential portion 3 With the tongues 2 extending from one edge thereof and an inwardly extending flange portion 4 at the other edge, as shown in Figure 2. The inside edge of the stamping having been a circle, the flange portion 4 is continuous and its internal edge is likewise circular but it will be appreciated that the flange portion need not be continuous but may, in effect, consist of a series of claws spaced preferably uniformly around the edge of the ring.

As shown in Figure 3, the condenser can 5 having a circumferential bead or equivalent projection 6 at one end thereof is secured to a support plate I in an upstanding manner by the mounting ring I which embraces the beaded end of the can with its inwardly directed flange 4 engaging the side of the circumferential bead remote from the support plate. The lugs 2 extending from the edge of the circumferential portion 3, which is directed towards and spaced from the support plate, pass through correspondingly shaped and positioned apertures in the support plate. The use of a long lug, by which is meant a lug which is at least twice as long as it is wide, permits the tip of the lug to be engaged by a tool and twisted whilst it is pulled. By twisting it through an angle of about or more the mounting ring is readily and securely anchored to the support plate without the necessity of applying pressure to the ring itself to hold it in position, as would be the case if short lugs were used and deformed by bending them oyer to lie flush with the underside of the support plate or by upsetting them.

The mounting ring may, as shown, be made a loose fit on the can in which case it will generally be preferable to place the can in position on its support before placing the ring on the can.

The use of our external mounting ring to secure a condenser can to its support plate has the practical advantage that it leaves the whole area of the end wall of the condenser can clear and unobstructed by the support plate and the anchoring lugs. This advantage assumes considerable importance in the case of cans of small diameter, for instance of 0.75 inch diameter, where the area of end wall available for the mounting of terminals is correspondingly limited, and, in all cases results in the clearance between the support plate 6 and the terminals 1 passing through the opening 8 in the plate being a maximum for a given diameter of can.

It will be appreciated that the shape of the mounting ring is conditioned by, and will in general correspond With, the cross-sectional form of the adjacent part of the article to be mounted.

For instance, the sheet metal mounting ring just described is of circular form to correspond with the shape of the condenser can which is that of a cylinder of circular cross-section; if the article to be mounted were a square prism, a square shaped ring would probably be preferable.

In some cases it may be advantageous to use a split ring, such as the ring I l shown in Figure 4. [This ring is cut through at a point l2 intermediate two of the four anchoring lugs I3 so that it may be sprung open to allow the inwardly turned flange I 4 to slip into position. over the end, and behind the circumferential bead [5, of an article, such as the can [6 shown in Figure 5, which has an end of less diameter than the adjacent portion. The ring is anchored to the support plate I! in the same way as previously described. In some cases it may be desirable to weaken the mounting ring at a point diametrically opposite the point at which it is cut through. This may be done by making a cut l8 in the flange part I4. Alternatively a ring may be built up of two or more segments which can be assembled round the positioned article. An example of such a. ring is shown in Figure 6 and consists of three segments Zla, Zlb, and He, each having three anchoring lugs 22. The cross-sectional shape of these segments is similar to that of the ring I I shown in Figure 5.

What we claim as our invention is:

Means for attaching an electric unit subject to vibration, to a support, said electric unit having a peripherally extending shoulder facing away from the support, said means comprising an annular member embracing the electric unit and having an inwardly extending flange engaging said shoulder on the electric unit and a plurality of lugs on said annular member adapted to pass through correspondingly positioned apertures in the support and having their projecting ends deformed to engage behind the support and anchor them thereto, whereby said unit is clamped firmly in surface-to-surface engagement with the support.

WILLIAM CECIL HANDLEY. JOSHUA CREER. QUAYLE, 

